Hi Elaine, it may be that your slow cooker is crocking too hot! Every slow cooker will crock differently, therefore for your slow cooker you may need to adjust the crock time for your slow cooker. I have several slow cooker, and for the most part they cook for the suggested time, but I have a couple that I always need to adjust the time for, so for future meals you should check them ahead of time with your slow cooker. Hope this helps and Happy Crocking!

Cannot wait to try this recipe! this is one of my favorite dishes and you have simplified it! Thank you!
One suggestion to help amp up the flavor even more, add some Sherry along with the Marsala. It really makes a difference!
Love you site!